Ferdinand frohlich



, siding at New York,

UNITED STATES PATENT OFFICE.

FERDINAND FROHLIOH, on NEW YORK, n- Y.

FIRE-EXTINGUISHING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 310,404, datedJanuary'G, 1885.

Application filed May 15, 1884. (Specimens) To all whom, it nut'yconcern:

Be it known that I, FERDINAND FRGHL'IOH, a citizen of the Republic. ofSwitzerland, re-

in the county and State of New York, have invented new and usefulImprovements in Compounds for'Extinguishing Fires, of which thefollowing is a specification.

.Myinvention relates to compound of silicate of soda, alum, common salt,and phosphate of ammonia, which, when mixed together in the properproportion and reduced-to a powder, form a compound which is easilysoluble in watcr, and which, when mixed with water and poured uponburning wood or other materials, assists materially to extinguish theflame, and it-also prevents the materials from reigniting.

In carrying out myinvention I take silicate of soda, seven part-s, (byweight); alum, five parts, (by weight;) (by weight phosphate of ammonia,one part, (by weight.) All the ingredients, with the'exception of thesilicate of soda, are reduced to a fine powder, and then they are driedin the open air until they contain no moisture. The alum is then mixedwith the liquid silicate of soda and well stirred until a solid mass isformed, which is dried in a" place from which the sun and.- alsoartificial heat are excluded, but in which a considerable draft of airexists. After having become dry it is reduced to a fine powder, and thenit is mixed with the salt and with the phosphate of ammonia. Byfollowing these directions a powder is obtained which is nothygroscopic', and which can be kept for a long time without becomingpasty or liquid.

11 preparing my compound, silicate of potash may be substituted forsilicate of soda.

rials is prevented.

common salt, two parts,

In using'my compound for extinguishing 4o fires I dissolve the same inany desired proportion in water, and introduce the solution into afire-engine, so as to be able to throw it upon the burning substances,or I pour it upon the desired spot or spots in any other manner. As thesolution comes in contact with the burning materials the flames areextinguished, and at the same time a coating is formed on the surfacesof the materials, whereby the air is excluded and the reignitiug of saidmate- It must also be remarked that all the ingredients contained in mycompound are perfectly harmless, and that the solution of thecompoundwhen brought in contact with textile fabrics, wood, or othermaterials, is not liable to injure the same.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. A fire-extinguishing compound consisting of an alkalinesilicate,alum, common salt, and phosphate of ammonia, combined and mixedtogether in about the proportion herein set forth;

2. A powder for admixture with in extinguishing fires, consisting ofsilicate of soda, alum, common salt, and phosphate of ammonia, combinedand mixed together substantially as herein described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

FERDINAND FRUHLICH. [n s.]

a liquid \Vitnesses:

E. F. KAsTnNHUmm CHAS. S. HAYEs.

